The Brief Aaliyah Arnold, a 20-year-old Houston entrepreneur, built her cosmetics company from the ground up, starting in her grandmother's living room and expanding to major retail chains. One Houston boss, who's barely out of her teens, has a lot to celebrate. Her cosmetics company is so successful, her products are now being sold in a couple of stores nationwide. What we know:Allow us to introduce you to Boss Up Cosmetics owner Aaliyah Arnold, who's only 20-years-old. "I started this company when I was 14, but before this, I had a slime business when I was 11 years old.